1021657342 has 16 divisors (see below), whose sum is σ = 1546094592. Its totient is φ = 506300760.

The previous prime is 1021657331. The next prime is 1021657391. The reversal of 1021657342 is 2437561201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 489433 + ... + 491515.

It is an arithmetic number, because the mean of its divisors is an integer number (96630912).

Almost surely, 2^1021657342 is an apocalyptic number.

1021657342 is a deficient number, since it is larger than the sum of its proper divisors (524437250).

1021657342 is a wasteful number, since it uses less digits than its factorization.

1021657342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4143.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 1021657342 is about 31963.3750095324. The cubic root of 1021657342 is about 1007.1676165285.

The spelling of 1021657342 in words is "one billion, twenty-one million, six hundred fifty-seven thousand, three hundred forty-two".